The author of this large and lavishly illustrated book had fifty-two human fetuses available for study. He systematically photographed, cut and stained the central nervous system of forty-four of them, although the great majority were so poorly preserved as to be worthless even for gross study. He seems to be quite unaware of the splendid monographs of Hochstetter and Streeter, which are based on normal, admirably preserved and prepared human material; indeed, the only original contributions to which he refers are the papers of Wilhelm His. He fails consequently to recognize as such the distortions of postmortem maceration and other artefacts. A few of the older specimens, prepared by a silver method, are worth describing, but one looks in vain for new details and for the answers to important questions which they might have given us. It is sad to see so much space and printers' ink wasted at the